Floor furnace



J. S. FAGAN FLOOR FURNACE Nov, 5, 1946.

Filed DeC.

13,2243 l l n.

INVENTOR.

Patented Nov. 5, 1946 UNITED STATES PATENT OFFICE FLOOR FURNACE JosephS. Fagan, Los Angeles, Calif.

1 Claim.

My invention relates to a floor furnace and has for its principalobject, to generally improve upon and simplify the existing forms of gasburning floor furnaces and to provide a furnace of simple, compactstructure that requires no screws, bolts, rivets or like fasteningdevices in the manufacture, thus effecting a material saving of time,labor and expense in production costs.

A further object of my invention is to provide a floor furnace of thecharacter referred to, wherein fresh air drawn from the exterior of thebuilding or structure in which the furnace is located, is heated in aburner chamber located in the lower portion of an air circulationchamber, which heated air passes through a grill forming the top of thefurnace and said air circulation chamber being surrounded by an airinsulation space through which air circulates and becomespartiallyvheated, before discharging into the upper portion of the aircirculation chamber and then through the grill.

With the foregoing and other objects in'view, my invention consistsincertain novel features of construction and arrangement of parts whichwill be hereinafter more fully described and claimed and illustrated inthe accompanying drawing in which:

Fig. 1 is a vertical, longitudinal section taken through the center ofmy improved floor furnace.

Fig. 2 is a cross section taken on the line 2 2 of Fig. l.

Fig. 3 is a detail sectional view taken through the center of the gasand air inlet end of the burner tube used in my improved'furnace.

Referring by numerals to the accompanying drawing which illustrates apreferred embodiment of my invention, l designates the outer shell ofthe furnace, which shell comprises side and end walls, preferably ofsheet metal with a continuous flange II projecting outwardly from theupper edges of said walls.

This flange rests directly upon a floor F of the building in which thefurnace is located with the shell I0 extending downward through openingO formed in said floor.

The side and end walls of a shell I3 which encloses the air circulatingchamber, are disposed within and spaced apart from the walls of outershell I0, thus providing a narrow air circulating space I3 between thewalls of the shells I0 and A flange IQ projects outwardly from the upperedges of the walls of shell I2 and overlies flange II. Removablypositioned in the upper portion Application December 28, 1943, SerialNo. 515,931

of shell I2 is a grill l5, preferably of cast or pressed metal, andprojecting outwardly from the edges of said grill, is an integral iiangeI6 which overlies flanges II and I4 and the outer portion of said flangelIE rests on the floor in which the furnace is installed.

Inner shell l2 is provided with an integral bottom I 'l and restingthereupon are the lower edges of the walls of the burner shell orhousing I8 closed at the top by an integral plate I9.

The Walls and top of the burner shell or housing I8 are spacedv apartfrom the walls of shell I2 and from grill I5, thus providing an ampleair circulation chamber entirely around and above said burner shell, andas above stated, the walls of said shell rest upon bottom I'I, withoutbeing attached thereto, and thus said shell may be bodily removed fromand positioned within the air circulating chamber.

Formed in bottom Il are apertures 2Q which admit fresh air to the burnerchamber in shell I3 and apertures 2l formed in said bottom admit freshair to the lower portion of the air circulation chamber shells I8 andIZ.

Formed in the upper and lower portions of the side and end walls ofshell I8 are air'circulation apertures 23. Formed in the lower portionsof the side and end walls of shell I2 are fresh air inlet apertures 24and formed in the upper portions of said walls arev air circulationapertures 25.

Located in the lower portion of the chamber with the shell I8 is aconventional gas burner tube 26 having at its inlet end, the usualrotating damper 2l, provided with a centrally disposed opening for thereception of the gas nozzle projecting from the gaseous fuel controlvalve 29, the latter being actuated by a rod 30 which ex' tends upwardthrough grill I5 and having a knob or key3I on its upper end. v

Formed in the end portions of top I9 of the burner shell are apertures32 of suflicient size to admit lighted tapers or the like, introducedthrough grill I5, for the purpose of lighting the jets of gas issuingfrom the burner tube. When the furnace is in use and burner tube islighted, the air within shell I 8 will be heated and discharge throughapertures 23 into the chamber within shell I2, thus inducing acontinuous flow of fresh air through apertures 20 into the burnerchamber to be heated therein and ow therefrom through apertures 23 intothe chamber within shell I 2. Thus heated fresh air will flow from thechamber within shell l2 upward through grill I5 into the room in whichthe heater is located.

lips. 3

At the same time, a flow of fresh air will be induced into the openlower end of circulation Space I3 between shells I0 and I2 and this airflowing upward through said space will become heated to a certain degreeas a result of contact with the heated wall of shell I2, and thispreheated fresh air forms an effective air insulation entirely aroundshell I2 and finally discharges throughapertures 25, to` unite with theheated Iare capable of being bodily positioned within and removed fromthe furnace, and to place said shell and tube in the lower portion ofshell I2, said parts are, before grill I5 is placed on top of thefurnace, lowered into `the shell i2 until `the lower edges of the wallsof shell i3 rest on theY bottom I1 of said shell I2.

The central aperture in damper 2l is now aligned with the nozzle ofvalve 29 and shell t8 and burner tube 26 are now moved toward valve 29,until the nozzle thereof passes through the aperturein the damper andoccupies a position within the inlet end of the burner tube as seen inFig. 3.

A reversal of the movements just described will d isengage the end'V ofthe burner tube from the nozzle of valve 29 and shell I8 carrying saidburner tube may now be lifted from shell or housing I2. The particularlyadvantageous vfeatures of my improved construction of door furnaces are:the heating of fresh air drawn from the exterior of the building inwhich the furnace is located, the entire absenceof rivets, screws, boltsand the like, fastening devices in the manufacture of the furnace, thelocation of the burner housing within the lower portion of the heatedair circulation chamber and the 'provisionof an air insulation spacearound said air circulation chamber, which latter arrangement materiallyincreases the ef- 4 ciency of the furnace and conserves fuelrequirements.

Thus it will be seen that I have provided a floor furnace -which issimple in structure, inexpensive of manufacture and very effective inperforming the functions for which it is intended.

It will be understood that minor changes in the size, form andconstruction of the various parts of my improved floor furnace may bemade and substituted for those herein shown and described withoutdeparting from the spirit of the invention, the scope of which is setforth in the appended claim.

I claim as my invention:

A floor furnace comprising an outer shell open top and bottom withimperforate side walls, an

inner shell disposed within said outer shell, the

side walls of both shells being spaced apart, the top of said innershell being open, a flange projecting outwardly from the upper `edge ofsaid inner shell and resting on the upper edge of the outer shell so asto close the upper end of the chamber between the walls of the twoshells, a perforated plate closing the bottom of said inner shell, therebeing air inlet openings formed in the upper and lower portion of thewalls of the inner shell, a separately formed, one-piece rectangularburner housing within said inner shell with the lower edges of theside-and end walls thereof resting on said perforated bottom plate sothat the latter provides a closure for the bottom of the chamber withinsaid burner housing, the walls and top of said housing being providedwith air outlet openings, a burner tube positioned in the lower portionof said housing with its ends removably positioned in the end wallsthereof so that said burner housing and tube may be positioned withinand removed from the chamber within said inner shell as a unit, a grillremovably positioned in the open upper end of said inner housing and aflange projecting outwardly from the edge of said grill and overlyingthe flange on the upper edge of said inner shell.

JOSEPH S. FAGAN.

